Free calculators for your renovation project
No signup. No ads. Just answers.
HomeReno.tools answers one question for a home project: exactly how much material to buy. Enter a room's dimensions or a garden bed's length and width, and each calculator returns quantities you can take straight to the store — gallons of paint, sheets of drywall, cubic yards of concrete, bags of mulch, pounds of grass seed. Nothing you type leaves your browser, and every tool lets you save the project as a file for later.
A material calculator is only as good as the rate behind it, so each of ours is tied to a published figure — a manufacturer's coverage rate, a concrete bag yield, a cooperative extension's seeding rate — rather than a round-number guess. The reasoning and the source for each figure sit on the calculator's own page and in the matching guide, so you can check the math before you spend.
The interior tools cover paint and drywall; the landscaping tools handle concrete, pavers, mulch, gravel, sod, grass seed, fencing and raised-bed soil. When you are ready to price a whole project, the renovation estimator rolls several saved takeoffs into one budget and adds a contingency. It is all free, runs entirely in your browser, and asks for nothing about you.